Acetic Acid → 4-[[N-(2-(tert-butoxycarbonylamino)-4,5-difluorobenzoyl)glycyl]aminomethyl]-1-(4-hydroxy-3-nitrobenzyl)piperidine

HRID 279329

Reaction equation

HRID 279329 reaction equation
[C:1]([O:5][C:6]([NH:8][C:9]1[CH:28]=[C:27]([F:29])[C:26]([F:30])=[CH:25][C:10]=1[C:11]([NH:13][CH2:14][C:15]([NH:17][CH2:18][CH:19]1[CH2:24][CH2:23][NH:22][CH2:21][CH2:20]1)=[O:16])=[O:12])=[O:7])([CH3:4])([CH3:3])[CH3:2].[OH:31][C:32]1[CH:39]=[CH:38][C:35]([CH:36]=O)=[CH:34][C:33]=1[N+:40]([O-:42])=[O:41].C(O)(=O)C.[BH3-]C#N.[Na+]>CO>[C:1]([O:5][C:6]([NH:8][C:9]1[CH:28]=[C:27]([F:29])[C:26]([F:30])=[CH:25][C:10]=1[C:11]([NH:13][CH2:14][C:15]([NH:17][CH2:18][CH:19]1[CH2:24][CH2:23][N:22]([CH2:36][C:35]2[CH:38]=[CH:39][C:32]([OH:31])=[C:33]([N+:40]([O-:42])=[O:41])[CH:34]=2)[CH2:21][CH2:20]1)=[O:16])=[O:12])=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 181694-Hydroxy-3-nitrobenzaldehydeHCID 5003444Sodium cyanoborohydrideHCID 184262024-[[N-(2-(tert-butoxycarbonylamino)-4,5-difluorobenzoyl)glycyl]aminomethyl]piperidine

Product 1

HCID 184261264-[[N-(2-(tert-butoxycarbonylamino)-4,5-difluorobenzoyl)glycyl]aminomethyl]-1-(4-hydroxy-3-nitrobenzyl)piperidineYield 87%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent2×

Conditions

Temperature
50 °C

Procedure

To a mixture of 4-[{N-(2-(tert-butoxycarbonylamino)-4,5-difluorobenzoyl)glycyl}aminomethyl]piperidine (0.35 mmol), 4-hydroxy-3-nitrobenzaldehyde (1.22 mmol), methanol (3.8 mL), and acetic acid (0.175 mL) was added NaBH3CN (1.58 mmol) in methanol (3.2 mL). The reaction mixture was stirred at 50° C. overnight. The mixture was cooled to room temperature, loaded onto Variant™ SCX column, and washed with CH3OH. Product was eluted off using 2 N NH3 in CH3OH and concentrated. The resulting material was dissolved into ethyl acetate/methanol=5/1, loaded onto Varian™ Si column, eluted off using ethyl acetate/methanol 5/1 (10 mL), and concentrated to give 4-[{N-(2-(tert-butoxycarbonylamino)-4,5-difluorobenzoyl)glycyl}aminomethyl]-1-(4-hydroxy-3-nitrobenzyl)piperidine (175 mg, 87%).

Workup

  1. temperatureThe mixture was cooled to room temperature
  2. washwashed with CH3OH
  3. washProduct was eluted off
  4. concentrationconcentrated
  5. dissolutionThe resulting material was dissolved into ethyl acetate/methanol=5/1
  6. washeluted off
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-34a00d983df145688f1127a3e7bb73dd
Source dataset
uspto-grants-2002_03
Patent number
US06362177B1

Linked notes

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